button {
    display: inline-block;
    line-height: 1;
    white-space: nowrap;
    cursor: pointer;
    text-align: center;
    box-sizing: border-box;
    outline: none;
    margin: 0;
    transition: 0.1s;
    font-weight: 500;
    padding: 12px 20px;
    font-size: 14px;
    border-radius: 4px;
    color: #fff;
    background-color: #409eff;
    border-color: #409eff;
    border: 0;
  }
  button:active {
    background: #3a8ee6;
    border-color: #3a8ee6;
    color: #fff;
  }